Trilobita - Asaphida - Nileidae
Parent taxon: Nileidae according to P. A. Jell and J. M. Adrain 2002
See also Sepkoski 2002
Sister taxa: Aocaspis, Barrandia, Berkutaspis, Borthaspidella, Bumastides, Elongatanileus, Homalopteon, Illaenopsis, Kodymaspis, Lakaspis, Neopsilocephalina, Nileidae stenorhachis, Nileus, Parabarrandia, Paraperaspis, Peraspis, Petrbokia, Platypeltoides, Poronileus, Psilocephalinella, Shenjiawania, Symphysurus, Varvia
Subtaxa: Symphysurina brevis Symphysurina bulbosa Symphysurina elegans Symphysurina globocapitella Symphysurina goniura Symphysurina myopia Symphysurina robusta Symphysurina spicata Symphysurina uncaspicata Symphysurina walcotti Symphysurina woosteri
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Ordovician of Canada (12: Alberta, British Columbia, Newfoundland, Newfoundland and Labrador, Yukon collections), Greenland (4), Sweden (1), United States (24: California, Idaho, Montana, Nevada, New Mexico, New York, Utah)
• Tremadoc of Canada (19: Alberta, Newfoundland and Labrador, Yukon), France (2), Sweden (2), United States (5: Montana, Texas, Utah, Vermont)
• Skullrockian of Canada (21: British Columbia, Newfoundland), Greenland (1), United States (25: New York, Texas, Utah)
• Cambrian of Canada (4: Newfoundland and Labrador), United States (10: Texas, Utah)
Total: 130 collections including 154 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.